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Work-related asthma: Number of cases by classification and state, 1993–2006


- indicates no cases ascertained.
1 Pre-existing asthma aggravated by exposure or condition at work.
2 Includes cases of reactive airways dysfunction syndrome and occupational asthma.
3 Known asthma inducers, defined by medical literature review, are designated in the Association of Occupational and Environmental Clinics (AOEC) exposure coding scheme (
4 Confirmed, but unclassified cases are confirmed work-related asthma cases, but lack the necessary information to determine if they are new-onset asthma or work-aggravated asthma.


Percentages may not sum to 100% due to rounding.

See Appendix for information about data sources and methods.


Provisional sentinel surveillance data as of December 2009, reported by R. Harrison and J. Flattery (California); L. Davis, E. Pechter, and K. Fitzsimmons (Massachusetts); K. Rosenman, MJ. Reilly, and D. Kalinowski (Michigan); and D. Schill and M. Pearson (New Jersey).

Reference Number: 2012T09-03

Date Posted: December 2012

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